A251952 Number of (n+2) X (2+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 3.

15246, 188296, 2723490, 41025310, 641763520, 10250030572, 165378271354, 2684347690572, 43717562894316, 713287612146476, 11649757719157308, 190377609927883884, 3112084939924022446, 50881861525857182420

Offset

1,1

Comments

Column 2 of A251955.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=2
..1..0..1..1....1..1..0..1....0..2..2..2....0..2..2..0....0..0..0..0
..2..2..2..1....1..0..0..2....0..2..0..2....0..0..2..2....0..0..2..2
..1..2..2..0....2..0..0..1....0..2..2..2....0..2..2..0....2..2..0..2
..1..2..2..0....1..2..1..2....2..0..0..0....2..0..2..2....0..2..0..2

Crossrefs

Cf. A251955.

Sequence in context: A259395 A233924 A115924 * A205996 A296087 A252318

Adjacent sequences: A251949 A251950 A251951 * A251953 A251954 A251955

Keyword

nonn

Author

R. H. Hardin, Dec 11 2014

Status

approved